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1.6—0.5x=2.7x+0.16

解:方程两边都加上0.5x,减去0.16,得: 3.2x=1.44 两边都除以3.2,得: x=0.45

=(1.5+4.8÷1.6x0.1)x2.7 =(1.5+3x0.1)x2.7 =1.8x2.7

(1)x²-34x+288=0 (x-16)(x-18)=0 x=16 或 x=18 (2)0.5x²-0.1x+2.7=0 解:由判别式△=b²-4ac=(-0.1)²-4x0.5x2.7=-5.39

5.5x=1.1 解得 x=0.2

x:2.7=(16-x):0.9 x/2.7=(16-x)/0.9 0.9x =2.7(16-x) x =3(16-x) x=48-3x 4x=48 x=12

0.16÷(x-1又25分之24)=1又20分之7÷2.7 0.16÷(x-1又25分之24)=20分之27÷2.7 0.16÷(x-1又25分之24)=0.5 x-1又25分之24=0.16÷0.5 x-1又25分之24=0.32 x-1.96=0.32 x=0.32+1.96 x=2.28

(10-6.76)÷1.2] = 0.8 x(3.24÷1.2) = 0.8 x 2.7 = 2.16...6-1.6÷4= 6- 0.4 = 5.65.38+7.85-5.37= 13.23 - 5.37=7.867....

(10-6.76)÷1.2] = 0.8 x(3.24÷1.2) = 0.8 x 2.7 = 2.16...6-1.6÷4= 6- 0.4 = 5.65.38+7.85-5.37= 13.23 - 5.37=7.867....

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